solve cos(2x-4)=sin(6x)

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solve cos(2x-4)=sin(6x)

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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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what's interval for x ?
i have no clue, im doing the work sheet and that is all it says for this question
it says solve for x

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Other answers:

|dw:1371573363440:dw|
remember complimentary angles
the answer choices are 20, -11, 10.75, or 11.75
forget your answers, understand concept
if just in the 1st quadrant. u can use the identity : cosx = sin(90-x) cos(2x-4)=sin(6x) sin(90-(2x-4))=sin(6x) 90-(2x-4) = 6x solve for x the result would be same like @dan817 said :)
oppss 815 not 817, hihi :)
hi :)
do u see how complimentary angles work now
in a right angled triangle the 2 other angles must add up to 90
Im really slow at picking up these concepts.....:/ so this im reallly lost..
hmm how else can i explain it
btw i really appriciate the help you guysss!!
no lets do it between 4 to pi+4 for 1 interval of your cos(2x-4)
hmmm.. for easier, solve this algebrically :) can u solve for x, this part : |dw:1371574314002:dw|
first solve an x that works and ill show u how u can find all the other xs that work
|dw:1371574763654:dw|
cos(2x-4)=cos(90-6x) a)2x-4=90-6x+360k b)2x-4=6x-90+360k a)x=94/8+45k b)x=86/4+90k
x=11.75

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